Why the Royal Navy valued twin-engine carrier aircraft

Why would the Royal Navy favor twin-engine aircraft if it had larger carriers?

Reliable long-range strike was the priority. Two engines could allow an aircraft to return after a failure, while coupled arrangements offered other ways to manage power and endurance.

Larger carriers would let the Royal Navy pursue reliable long-range strike aircraft without necessarily buying a much larger air group. Two engines offer the possibility of returning and landing after one fails. Multiple engines also need not sit in separate nacelles: coupled arrangements provide another approach. The Fairey Gannet's Double Mamba is cited from memory as an example whose engine or propeller shutdown details remain uncertain in the initial answer. A later viewer contribution describes alternating the engines to save fuel, extend range, and even out engine wear.